Frederick b



(No Model.)

I P. B. KING.

SECTION RULER.

No. 598,875. Patented Feb. 8. 1898.

UNITED STATES PATENT, OFFICE.

FREDERICK B. KING, OF NEWV YORK, N. Y.

SECTlON-RULER.

SPECIFICATION forming part of Letters Patent N 0. 598,875, datedFebruary 8, 1898.

Application filed April 20, 1897- To all whom it may concern:

Be it known that I, FREDERICK B. KING, a citizen of the United States,and a resident of the city of New York, in the county of New York andState of New York, have invented certain new and useful Improvements inSection-Rulers, of which the following is a specification.

The object of my invention is to provide a new and improvedsection-ruler for use in drawing cross-hatched lines spaced any desireddistance or at any desired angle, which ruler is simple in construction,easily adjusted, not apt to get out of order, and at all times isreliable.

In the accompanying drawings, forming a part of this specification, inwhich like letters of reference indicate like parts in all the views,Figure 1 is a plan view of my improved section-ruler. Fig. 2 is a sideView of the same, parts being in section. Fig. 3 is a detail verticallongitudinal sectional view through the sliding spring-pressed plate.

On the base-plate A, made of wood or metal, preferably the latter, apost or standard B is fastened near one end, and in the same a rod 0 issecured at one end so as to extend longitudinally over the base-plate. Atube D, fitting quite snugly on the rod 0, is mounted to slide on saidrod and is guided in an apertured post or standard B on the uppersurface of the base-plate on the end opposite the post or standard B;

A plate F is secured on the inner end of the tube D, and to the underside of the same is pivoted a ruler G, which can be locked to said plateF at any desired angle by means of a bindin -screw H, passed through asemicircular slot J, formed in the plate F concentric with the pivot F,by which the ruler G is pivoted to the plate F.

A plate K is guided to slide longitudinally on the upper surface of thebase-plate A by two screws K K, passed through longitudinal slots in theend parts of the plate and into the base-plate, and said plate K isprovided with a laterally-projecting handle-arm L, provided at its freeend with a knob L, and an adjustable stop M is provided on the baseplateA, adjacent to the knob L, for the purpose of limiting the stroke ofsaid knob.

A lug or wing N projects from the under side of the sliding plate K intoa longitudinal groove S in the upper surface of the baseplate, andagainst said lug one end of a heli- Serial No. 632,927- (No model.)

cal spring O presses, which is contained in the groove S and serves topress the plate K in the direction toward the left.

Two spring-pressed jaws P, adapted to grip the tube D, are pivoted tothe upper surface of the plate K at opposite sides of the tube D in sucha manner that when the plate K is shifted to the right said jaws gripthe tube D and also move the same to the right, but do not act on saidtube when the plate K moves to the left. l

The operation isas follows: The'ruler G is adjusted on the plate F tothe desired slant or angle and the plate F, with the tube D, is moved tothe left until the edge of the ruler G is at the place at which thediagonal lines or sectioning-lines are to begin. The first diagonal lineis drawn along the edge of the ruler G, and then by means of the lefthand the plate X is shifted to the right and the grip-jaws P, which gripthe tube D, also shift the same, with the plate F and ruler G, to theright until the button L strikes against the stop M, which has beenpreviously adjusted according to the desired spacing of the inclined orsection lines. The button L is released and the spring 0 throws theplate K back in the direction to the left into the initial position, thejaws P sliding freely on the tube D. The next line is drawn and the tubeD, with the plate F and ruler G, again shifted in the manner described.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In a section-ruler the combination with a base-plate, of a guide-rodsecured on the base to extend longitudinally over the base-plate, a tubemounted to slide on said rod, a ruler attached to the tube, a slidingplate on the base-plate, a lug projecting downward from said plate intoa groove in the base-plate, a spring in said groove bearing against saidlug, gripping-jaws pivoted to said plate to engage the sliding tube andan adjustable stop for the sliding plate, substantially as herein shownand described.

In testimony that I claim the foregoing as

